Allow inserts to alias table names

[mezuzza]

I'm not sure if all DBs allow this, but at least in postgres you can alias the table. The specific part of the spec that I'm referencing is this:

INSERT INTO table_name [ AS alias ]

So I can write

INSERT INTO some_schema.some_table AS some_alias (col1)
VALUES (1)

Since QueryCreator.insertInto doesn't have any overrides for AnyAliasedTable, there doesn't seem to be a way to do this.

[alenap93]

Could we use TableExpression in InsertInto and not Table?